Vaisala HMD62 User manual

M212016EN-C

User Guide

HMD60 Series Humidity and Temperature

Transmitters for Ducts in HVAC

HMD62 TMD62

PUBLISHED BY

Vaisala Oyj

Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland

P.O. Box 26, FI-00421 Helsinki, Finland

+358 9 8949 1

Visit our Internet pages at www.vaisala.com.

No part of this document may be

reproduced, published or publicly

displayed in any form or by any means,

electronic or mechanical (including

photocopying), nor may its contents be

modiﬁed, translated, adapted, sold or

disclosed to a third party without prior

written permission of the copyright holder.

Translated documents and translated

portions of multilingual documents are

based on the original English versions. In

ambiguous cases, the English versions are

applicable, not the translations.

The contents of this document are subject

to change without prior notice.

Local rules and regulations may vary and

they shall take precedence over the

information contained in this document.

Vaisala makes no representations on this

document’s compliance with the local

rules and regulations applicable at any

given time, and hereby disclaims any and

all responsibilities related thereto.

This document does not create any legally

binding obligations for Vaisala towards

customers or end users. All legally binding

obligations and agreements are included

exclusively in the applicable supply

contract or the General Conditions of Sale

and General Conditions of Service of

Vaisala.

This product contains software developed

by Vaisala or third parties. Use of the

software is governed by license terms and

conditions included in the applicable

supply contract or, in the absence of

separate license terms and conditions, by

the General License Conditions of Vaisala

Group.

This product may contain open source

software (OSS) components. In the event

this product contains OSS components,

then such OSS is governed by the terms

and conditions of the applicable OSS

licenses, and you are bound by the terms

and conditions of such licenses in

connection with your use and distribution

of the OSS in this product. Applicable OSS

licenses are included in the product itself

or provided to you on any other applicable

media, depending on each individual

product and the product items delivered

to you.

Table of contents

1. About This Document................................................................................... 3

1.1 Version Information.......................................................................................... 3

1.2 Related Manuals................................................................................................3

1.3 Documentation Conventions...........................................................................3

1.4 Trademarks........................................................................................................ 4

2. Product Overview........................................................................................... 5

2.1 Introduction to HMD60 Series.........................................................................5

2.2 HMD62 and TMD62 Basic Features and Options.......................................... 5

2.3 Available Parameters and Default Scaling.....................................................5

2.4 Connectivity to Vaisala Insight Software.......................................................6

2.5 Transmitter Parts...............................................................................................7

2.5.1 Cable Gland and Conduit Options...........................................................8

2.5.2 Filter Options..............................................................................................8

2.5.3 Humidity Sensor Options..........................................................................9

2.5.4 Transmitter Board.................................................................................... 10

2.5.5 Trimmers.....................................................................................................11

2.5.6 DIP Switch Output Selection (HMD62)..................................................12

2.6 Filtering Factor.................................................................................................13

2.7 Environmental Compensation (HMD62)...................................................... 13

3. Installation........................................................................................................14

3.1 Transmitter Dimensions..................................................................................14

3.2 Duct Mounting Overview................................................................................15

3.3 Installing into Duct.......................................................................................... 16

3.4 Wiring................................................................................................................17

3.4.1 Startup Surge Current............................................................................. 18

4. Calibration and Adjustment...................................................................... 19

4.1 Calibration and Adjustment Overview..........................................................19

4.2 Calibration and Adjustment Using Trimmers...............................................19

4.2.1 1-Point Adjustment Using Trimmers and Reference Calibrator.........20

4.2.2 Adjusting Output Using Trimmers and Reference

Transmitter (1-point adjustment)..........................................................20

4.2.3 Resetting Trimmers Back to Zero...........................................................21

4.3 Calibration and Adjustment with Insight PC Software.............................. 22

4.3.1 2-Point Adjustment with Insight and Reference Calibrator...............23

4.3.2 1-Point Adjustment with Insight and Reference Transmitter.............24

4.4 Calibration and Adjustment with MI70 Handheld Indicator......................25

4.4.1 1-Point Adjustment Using Reference Environment.............................25

5. Operating with Insight PC Software.....................................................28

5.1 Vaisala Insight Software................................................................................ 28

5.2 Connecting to Insight software.................................................................... 28

5.3 Insight Main View........................................................................................... 30

5.3.1 Basic and Advanced User Modes..........................................................30

Table of contents

1

5.4 Conﬁguring Analog Outputs with Insight.................................................... 31

5.4.1 Testing and Adjusting Analog Output Current (mA) Level................32

5.5 Conﬁguring Minimum and Maximum RH and T Errors with Insight.........33

5.6 Changing Pressure Compensation Settings with Insight (HMD62)......... 35

5.7 Setting Filtering Factor with Insight............................................................ 36

6. Operating with MI70 Indicator................................................................37

6.1 Overview of MI70 Support............................................................................ 37

6.1.1 MI70 Indicator Parts................................................................................37

6.2 Connecting HMD60 to MI70 Indicator.........................................................38

6.3 Basic Display................................................................................................... 39

6.4 Graphical Display............................................................................................39

6.5 Main Menu.......................................................................................................40

6.6 Holding and Saving the Display................................................................... 40

6.7 Recording Data................................................................................................41

7. Maintenance....................................................................................................42

7.1 Cleaning...........................................................................................................42

8. Technical Data................................................................................................43

8.1 Speciﬁcations..................................................................................................43

8.2 Spare Parts and Accessories.........................................................................45

8.3 Transmitter Dimensions.................................................................................46

Warranty............................................................................................................ 47

Technical support............................................................................................ 47

Recycling........................................................................................................... 47

HMD62 TMD62 User Guide M212016EN-C

2

1. About This Document

1.1 Version Information

Table 1 Document versions

Document Code Date Description

M212016EN-C February 2020 This manual. Added information on HUMICAPâ 180V

catalytic sensor option, sintered teﬂon ﬁlter option, and

startup surge current.

M212016EN-B May 2019 Previous version. Added information about short probe

option and the HMD65 transmitter model, updated the

information on the eect of DIP switch parameter

selection on Insight conﬁguration. Corrected ﬁltering

factor formula. Stability speciﬁcation corrected, lead-

through and plug appearance updated in illustrations.

M212016EN-A September 2018 First version of the document.

1.2 Related Manuals

Table 2 Related Manuals

Document Code Description

M212049EN HMD62 and TMD62 Multilingual Quick Guide (languages: English,

German, French, Spanish, Portuguese, Russian, Chinese, Japanese)

M212243EN HMD65 User Guide in English

M212264EN HMD65 Multilingual Quick Guide (languages: English, German,

French, Spanish, Portuguese, Russian, Chinese, Japanese)

1.3 Documentation Conventions

alerts you to a serious hazard. If you do not read and follow

instructions carefully at this point, there is a risk of injury or even death.

WARNING!

warns you of a potential hazard. If you do not read and follow

instructions carefully at this point, the product could be damaged or important

data could be lost.

CAUTION!

Chapter 1 – About This Document

3

Note highlights important information on using the product.

Tip gives information for using the product more eciently.

1.4 Trademarks

Vaisalaâ and HUMICAPâ are registered trademarks of Vaisala Oyj.

Windowsâ is either a registered trademark or trademark of Microsoft Corporation in the

United States and other countries.

All other product or company names that may be mentioned in this publication are trade

names, trademarks, or registered trademarks of their respective owners.

HMD62 TMD62 User Guide M212016EN-C

4

2. Product Overview

2.1 Introduction to HMD60 Series

The duct mounted HMD60 HUMICAPâ Humidity and Temperature Transmitters are designed

for monitoring humidity and temperature in demanding HVAC and light industrial applications.

HMD60 series transmitters provide stable, reliable, and highly accurate (up to ±1.5 %RH and

±0.1 °C (0.18 °F)) measurements, and are resistant to chemicals and dust.

HMD60 series transmitter options include 2 analog output models: HMD62 for measuring both

humidity and temperature, and TMD62 for temperature measurements. Both HMD62 and

TMD62 use 4 ... 20 mA loop-powered current output. The HMD65 transmitter model includes

both analog and digital output options.

Thanks to easy access to electronics also when the transmitter is installed to a duct,

conﬁguration and adjustment can be carried out quickly and conveniently. Available

conﬁguration and adjustment interface options range from physical trimmers and DIP switches

on the transmitter's circuit board to Vaisala Insight PC software for Windowsâ.

2.2

HMD62 and TMD62 Basic Features and

Options

• Measurement options:

• HMD62 for humidity and temperature measurement

• TMD62 for temperature measurement

• Humidity parameters available as output options in HMD62: RH, T

d

, T

df

, A, X, T

w

, H

• Analog output: 4 ... 20 mA, loop powered

• HMD62: 2 analog output channels for humidity and temperature measurements

• TMD62: 1 analog output channel for temperature measurement

• Power supply input: 10 ... 35 VDC / 20 ... 35 VDC

• Conﬁguration and adjustment options:

• RH and T measurement ﬁeld adjustment with trimmers

• Humidity output parameter selection with DIP switches (HMD62)

• Field adjustment with MI70 handheld indicator

• Conﬁguration and adjustment with Vaisala Insight PC software

2.3

Available Parameters and Default Scaling

HMD62 Measurement Parameters and Default Analog Output

Scaling

Table 3 (page 6) shows the available output parameters and the default analog output

scaling of the parameters for HMD62.

Chapter 2 – Product Overview

5

Table 3 HMD62 Measurement Parameters and Default Scaling

Parameter Default Scaling for 4 … 20 mA Output Range

Relative humidity (RH) 0 … 100 %RH

Temperature (T) -20 ... +80 °C (-4 ... +176 °F)

Dew point temperature (T

d

) -40 ... +80 °C (-40 ... +176 °F)

Dew point/frost point

temperature (T

df

)

-40 ... +80 °C (-40 ... +176 °F)

Absolute humidity (A)

0 … 300 g/m

3

(0 … 131.1 gr/ft

3

)

Mixing ratio (X) 0 … 600 g/kg (0 … 4200 gr/lb)

Wet-bulb temperature (T

w

) -40 ... +80 °C (-40 ... +176 °F)

Enthalpy (H) -40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)

TMD62 Measurement Parameters and Default Analog Scaling

Table 4 (page 6) shows the available output parameters and the default analog output

scaling of the parameters for TMD62.

Table 4 TMD62 Measurement Parameters and Default Scaling

Parameter Default Scaling for 4 … 20 mA Output Range

Temperature (T) -20 ... +80 °C (-4 ... +176 °F)

Changing Measurement Parameter Scaling

If your application requires an analog output scaling that diers from the defaults shown in

Table 3 (page 6) and Table 4 (page 6), you can conﬁgure the scaling by connecting the

transmitter to Vaisala Insight PC software (requires Vaisala USB cable 219690).

2.4

Connectivity to Vaisala Insight Software

The transmitter can be connected to Vaisala Insight software using a Vaisala USB cable (order

code 219690). With the Insight software, you can:

• Calibrate and adjust the measurement.

• See device information and status.

• See real-time measurement.

• Conﬁgure output parameters and scaling.

More information

‣

Connecting to Insight software (page 28)

HMD62 TMD62 User Guide M212016EN-C

6

2.5 Transmitter Parts

1

2

3

4

5

6

7

8

9

Figure 1 HMD62 and TMD62 Transmitter Parts Overview

1

Captive screw (2 pcs, cross-head) for attaching the lid of the transmitter.

2 Screw (2 pcs) for mounting the transmitter on the installation surface.

3 Transmitter lid. Open the captive screws of the lid to access input and output electronics.

4 Transmitter base. Contains the input and output connectors on the transmitter board: see

Transmitter Board (page 10).

5 Cable gland (M16 x 1.5 lead-through) for leading wires into the transmitter.

6 Alternative lead-through (M20 x 1.5) for wiring.

7 Probe body. Long (shown) and short probe options available: see Transmitter Dimensions

(page 14).

8 Probe ﬁlter (default option: AISI 316L stainless steel).

9 HUMICAPâ sensor inside the probe ﬁlter.

Do not touch the sensor element.CAUTION!

Chapter 2 – Product Overview

7

2.5.1 Cable Gland and Conduit Options

HMD60 has 2 lead-throughs (M16x1.5 and M20x1.5) that can be used with a variety of cable

gland and conduit options. Figure 2 (page 8) shows the cable gland and conduit options

available from Vaisala.

1

2

Figure 2 HMD60 Cable Gland and Conduit

Options

1 Cable Gland and O-ring M16 x 1.5

(Vaisala order code: 254280SP). This is

the default option delivered with

HMD60.

2 Conduit ﬁtting and O-ring (M16x1.5 /

NPT1/2") (Vaisala order code:

210675SP).

More information

‣

Spare Parts and Accessories (page 45)

2.5.2 Filter Options

Figure 3 (page 8) shows the ﬁlter options available for HMD60.

1 2 3

Figure 3 HMD60 Filter Options

1

Metal grid with PTFE membrane (Vaisala order code ASM212652SP). This is the default

option delivered with HMD60.

2 Sintered stainless steel ﬁlter (Vaisala order code HM46670SP).

3 Sintered teﬂon ﬁlter (Vaisala order code DRW244938SP)

HMD62 TMD62 User Guide M212016EN-C

8

More information

‣

Spare Parts and Accessories (page 45)

2.5.3 Humidity Sensor Options

HMD60 series humidity transmitters (HMD62 and HMD65) have the following humidity sensor

options (selected when ordering):

• HUMICAPâ R2: Latest generation industrial humidity sensor with improved corrosion

resistance.

• HUMICAPâ 180V: Humidity sensor with a catalytic surface for processes with hydrogen

peroxide (H

2

O

2

).

Note that the HUMICAPâ 180V and HUMICAPâ R2 sensors have a dierent temperature range

for speciﬁed accuracy: 180V accuracy has been speciﬁed down to -20 °C (-4 °F), and R2

accuracy down to -40 °C (-40 °F).

For full measurement speciﬁcations, see Speciﬁcations (page 43).

Chapter 2 – Product Overview

9

2.5.4 Transmitter Board

1

3

4

5

6

2

Figure 4 HMD60 Transmitter Board: Service Port, DIP switches, Trimmers and Screw Terminals

1

Service port for MI70 handheld indicator and Insight PC software cable connection.

2 DIP switches for humidity parameter selection (HMD62).

3 Trimmer for humidity measurement adjustment (HMD62).

4 Screw terminals for humidity measurement output (HMD62).

5 Screw terminals for temperature measurement output.

6 Trimmer for temperature measurement adjustment.

The HMD62 board (shown in Figure 4 (page 10)) includes options for both

humidity and temperature output. The TMD62 board includes only components

limited to temperature output options. See Wiring (page 17) for more

information.

HMD62 TMD62 User Guide M212016EN-C

10

2.5.5 Trimmers

1

Figure 5 Component Board Adjustment

Trimmer

1 Use a Phillips head screwdriver (PH0)

to rotate the RH or T adjustment

trimmer. To increase the measurement

output value, rotate the trimmer

clockwise. To decrease, rotate

counterclockwise.

Note that there is a slight delay before

the measurement output changes

after rotating the trimmer.

You can adjust the transmitter's RH (HMD62) or T (HMD62 and TMD62) measurement output

with the trimmers on the component board. During trimmer adjustment, the output of the

transmitter is corrected using the trimmers until the output matches the known value of a

reference.

±0 %RH

−1 %RH

−2 %RH

−3 %RH

−4 %RH

−5 %RH

+1 %RH

+2 %RH

+3 %RH

+4 %RH

+5 %RH

±0 °C

−0.06 °C

−0.12 °C

−0.18 °C

−0.24 °C

−0.3 °C

+0.06 °C

+0.12 °C

+0.18 °C

+0.24 °C

+0.3 °C

HMD62: −5 %RH ... +5 %RH TMD62, HMD62: −0.3 °C ... +0.3 °C

RH T

Figure 6 RH and T Trimmer Adjustment Ranges (Indicative)

You can only calibrate the relative humidity measurement (RH) and temperature

measurement (T). Other parameters (available for HMD62) are calculated

internally based on RH and T. Check that the output selection DIP switch is set to

RH when making adjustments with the physical trimmer; when using the Insight

PC software, set all DIP switches to the OFF position.

If you use the Insight PC software to adjust the measurement or to

restore the factory settings, always return the physical trimmer to the middle

position before starting. When you make an adjustment with Insight, the

position in which the trimmer is at that point is set as the ±0 point.

CAUTION!

Chapter 2 – Product Overview

11

2.5.6 DIP Switch Output Selection (HMD62)

Figure 7 HMD62 DIP Switch Example: T

df

Output Selected

RH Relative humidity

Td Dew point temperature

Tdf Dew point/frost point temperature

A Absolute humidity

X Mixing ratio

Tw Wet-bulb temperature

H Enthalpy

You can change the humidity parameter that is output on the RH channel of HMD62 with the

DIP switches on the component board. Select the parameter you want the transmitter to

output by sliding the parameter's DIP switch to the right (ON). In the example in Figure 7

(page 12), the transmitter's selected output parameter is dew point/frost point temperature

(T

df

). Keep the other DIP switches in the OFF position (left).

The selected parameter uses the default scaling shown in Table 5 (page 12).

Table 5 HMD62 Default Parameter Scaling

Parameter Default Scaling for 4 … 20 mA Output Range

RH 0 … 100 %RH

T

d

-40 ... +80 °C (-40 ... +176 °F)

T

df

-40 ... +80 °C (-40 ... +176 °F)

A

0 … 300 g/m

3

(0 … 131.1 gr/ft

3

)

X 0 … 600 g/kg (0 … 4200 gr/lb)

T

w

-40 ... +80 °C (-40 ... +176 °F)

H -40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)

Note that the humidity output parameter selected with the DIP

switches on the transmitter component board will be used instead of the

parameter selected with Insight. When using Insight to conﬁgure the output, set

all humidity parameter selection DIP switches on the transmitter component

board to the OFF position (left) to ensure they do not cause a conﬂict with the

Insight settings.

CAUTION!

HMD62 TMD62 User Guide M212016EN-C

12

HMD62 only:If you use Insight to set both analog output channels to output T

measurement, the humidity parameter DIP switches do not have an eect on the

output.

2.6 Filtering Factor

If the measuring environment produces occasional exceptionally high or low readings that

need to be averaged out in the output, you can apply a ﬁltering factor to the RH or T output

(ﬁltering factor range: 0.001 … 1.000). The ﬁltering factor deﬁnes the speed at which the latest

measurement is integrated into the transmitter's output. By default, the ﬁltering factor is set to

0.500, which means that the displayed output is a 50%+50% combination of the previous

measurement and the most recent measurement. To show the latest measurement directly in

the output, set the ﬁltering factor to 1.000 (no ﬁltering).

The following formula is used when calculating the output:

output = [(new (unﬁltered) measurement × ﬁltering factor) + (previous output × (1.0 - ﬁltering

factor))]

The ﬁltering factor can be conﬁgured with the Insight PC software.

More information

‣

Setting Filtering Factor with Insight (page 36)

2.7

Environmental Compensation (HMD62)

By default, the pressure value used in HMD62 measurement calculation is 1013.2 hPa. If the

pressure of your measurement environment diers from this, you can conﬁgure the

transmitter's pressure compensation value with the Insight PC software.

More information

‣

Changing Pressure Compensation Settings with Insight (HMD62) (page 35)

Chapter 2 – Product Overview

13

3. Installation

3.1 Transmitter Dimensions

The dimensions are given in millimeters and [inches].

299 [11.77]

49 [1.92]

250 [9.84]

101 [3.97]

mm

[in]

101 [3.97]

82[3.23]

82 [3.23]

Ø 12 [0.47]

19.5 [0.77]

149 [5.87]

49 [1.92]

100 [3.94]

101 [3.97]

Ø 12 [0.47]

19.5 [0.77]

Figure 8 Dimensions with Long and Short Probe

HMD62 TMD62 User Guide M212016EN-C

14

3.2 Duct Mounting Overview

90°

1

4

3

2

5

6

7

Figure 9 Duct Installation Overview

1

Make sure there is a minimum clearance of 5 m (16.5 ft) between the probe body and any

possible humidiﬁer. Avoid installing in a location where condensation can fall on the

sensor inside the duct.

2 When installing the transmitter, drill a second hole approximately 30 cm (12 in) from the

installation hole, towards the direction of the air ﬂow, and plug it with a removable seal.

This second hole is intended for later use in reference measurement with another device

when calibrating or adjusting the transmitter.

3 Check that the duct diameter is suitable for the probe body (see Transmitter Dimensions

(page 14)). Ideally, the sensor (probe head) should be installed in the middle of the duct.

4 Maximum air ﬂow speed: 50 m/s (with sintered ﬁlter).

5 Avoid installing the transmitter in dead legs. Supersaturation can occur in areas where

there is no air ﬂow.

6 Do not install the probe in a downward angle. Condensation can travel to the sensor along

the probe body if the probe points down.

7 Install the probe in a 90° angle so that the sensor is placed as close to the middle of the

duct as possible.

Chapter 3 – Installation

15

3.3 Installing into Duct

• Medium size crosshead screwdriver for mounting screws and lid screws.

• Small slotted screwdriver for screw terminals.

• Drill with 3.5 mm (0.14 in) and 13 … 15 mm (0.51 … 0.59 in) bits for making the

installation holes.

• Tools for cutting and stripping wires.

2 x Ø 3.5 [0.14]

Ø 13 ... 15 [0.51 ... 0.59]

Ø 12 [0.47]

82 [3.23]

mm

[in]

Ø 3.5 [0.14]

3.1 ... 3.4 Nm [2.3 ... 2.5 ft-lbs]

Figure 10 Drilling and Mounting Screws

1. Select an installation location for the transmitter on the duct surface and drill a

Ø 13 … 15 mm (0.51 … 0.59 in) hole for inserting the probe.

2. Push the probe through the hole on the duct until the transmitter body meets the duct.

3. Attach the transmitter body to the duct with 2 Ø 3.5 mm (0.14 in) screws.

Check that the insulation ring sits tightly over the installation hole. If the duct

has a negative pressure, external air can be drawn into the duct and aect

the measurement if the installation hole is not sealed tightly.

4. Optional: Drill a second hole for reference measurements approximately 30 cm (12 in)

from the transmitter installation hole. See Figure 9 (page 15).

5. Open the 2 captive screws on the transmitter body and remove the lid.

6. Attach the input/output wiring to the screw terminals on the transmitter component

board. See Wiring (page 17). Tighten cable glands ﬁrmly after wiring.

7. Check that the DIP switches and trimmers are in the correct position. See DIP Switch

Output Selection (HMD62) (page 12) and Trimmers (page 11).

HMD62 TMD62 User Guide M212016EN-C

16

8. Close the transmitter lid and switch on the transmitter's power supply input.

3.4 Wiring

HMD62

TMD62

mA

+

−

+

−

mA

+

−

Shield

Current loop 1:

RH, 4 ... 20 mA

Current loop 2:

T, 4 ... 20 mA

Current loop 1:

T, 4 ... 20 mA

Shield

Supply voltage for

each current loop:

20 ... 35 VDC at 600 Ω

10 ... 35 VDC at 0 Ω

Figure 11 HMD62 and TMD62 Wiring Diagrams

• Screw terminal wire size: 0.5 ... 2.5 mm

2

• Flat head screwdriver: 0.6×3.5 mm

Chapter 3 – Installation

17

Make sure that you prepare or connect only de-energized wires.WARNING!

Using a power supply with overload protection is recommended for electrical

safety.

3.4.1 Startup Surge Current

When the transmitter powers up, the startup surge current may rise up to 120 mA. If you are

connecting the transmitter to a system that uses a current limiting function, this can cause a

startup issue that prevents the transmitter from powering up.

To resolve a startup issue caused by current limiting, try one of the following options:

1. Adjust the current limiting function of the system to which you are connecting the

transmitter so that it can accommodate the startup surge current.

2. Add an extra load resistor between the +RH terminal and the power supply. The value of

the serial resistor must be calculated based on the supply voltage and shunt resistance

value.

HMD62 TMD62 User Guide M212016EN-C

18

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